Electrically conductive, mechanically robust, pH-sensitive graphene/polymer composite hydrogels

2016 ◽  
Vol 127 ◽  
pp. 119-126 ◽  
Author(s):  
Ashraful Alam ◽  
Qingshi Meng ◽  
Ge Shi ◽  
Sherif Arabi ◽  
Jun Ma ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Ph Sensitive ◽  
Electrically Conductive ◽  
Composite Hydrogels

scholarly journals Plasma Deposition and UV Light Induced Surface Grafting Polymerization of NIPAAm on Stainless Steel for Enhancing Corrosion Resistance and Its Drug Delivery Property

Polymers ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1009 ◽  
Author(s):  
Ko-Shao Chen ◽  
Shu-Ju Chang ◽  
Chi-Kuang Feng ◽  
Win-Li Lin ◽  
Shu-Chuan Liao
Keyword(s):  
Drug Delivery ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Uv Light ◽  
Plasma Deposition ◽  
Ph Sensitive ◽  
Fixed Temperature ◽  
Composite Hydrogels ◽  
Polarization Dynamic ◽  
Silicone Film

When stainless steel is implanted in human bodies, the corrosion resistance and biocompatibility must be considered. In this study, first, a protective organic silicone film was coated on the surface of stainless steel by a plasma deposition technique with a precursor of hexamethyldisilazane (HMDSZ). Then, ultraviolet (UV) light-induced graft polymerization of N-isopropylacrylamide (NIPAAm) and acrylic acid (AAc) in different molar ratios were applied onto the organic silicone film in order to immobilize thermos-/pH-sensitive composite hydrogels on the surface. The thermo-/pH-sensitive composite hydrogels were tested at pH values of 4, 7.4 and 10 of a phosphate buffer saline (PBS) solution at a fixed temperature of 37 °C to observe the swelling ratio and drug delivery properties of caffeine which served as a drug delivery substance. According to the results of Fourier Transformation Infrared (FTIR) spectra and a potential polarization dynamic test, the silicone thin film formed by plasma deposition not only improved the adhesion ability between the substrate and hydrogels but also exhibited a high corrosion resistance. Furthermore, the composite hydrogels have an excellent release ratio of up to 90% of the absorbed amount after 8h at a pH of 10. In addition, the results of potential polarization dynamic tests showed that the corrosion resistance of stainless steel could be improved by the HMDSZ plasma deposition.

Nanostructured electrically conductive hydrogels obtained via ultrafast laser processing and self-assembly

Nanoscale ◽  
2019 ◽  
Vol 11 (18) ◽  
pp. 9176-9184 ◽  
Author(s):  
Yufeng Tao ◽  
Chengyiran Wei ◽  
Jingwei Liu ◽  
Chunsan Deng ◽  
Song Cai ◽  
...  
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Self Assembly ◽  
Laser Processing ◽  
Ultrafast Laser ◽  
Polymeric Matrix ◽  
Polymer Composite Materials ◽  
Electrically Conductive ◽  
Conductive Hydrogels

Ultrafast laser-processed MWNT/polymer composite materials for an absorbent polymeric matrix and self-assembly of PEDOT:PSS to obtain nanostructured electrically conductive hydrogels.

scholarly journals Effect of ionic strength on shear-thinning nanoclay–polymer composite hydrogels

2018 ◽  
Vol 6 (8) ◽  
pp. 2073-2083 ◽  
Author(s):  
Amir Sheikhi ◽  
Samson Afewerki ◽  
Rahmi Oklu ◽  
Akhilesh K. Gaharwar ◽  
Ali Khademhosseini
Keyword(s):  
Ionic Strength ◽  
Rheological Properties ◽  
Polymer Composite ◽  
Biomedical Applications ◽  
Shear Thinning ◽  
Composite Hydrogels ◽  
Polymer Interactions ◽  
Fundamental Insight ◽  
Insight Into

The effect of ionic strength on the structure and rheological properties of nanoclay–gelatin shear-thinning biomaterials (STBs) is investigated. A fundamental insight into nanoclay–polymer interactions in physiological environments is provided to design clay-based biomaterials for biomedical applications.

pH-sensitive photocatalytic activities of TiO2/poly(vinyl alcohol)/poly(acrylic acid) composite hydrogels

2011 ◽  
Vol 176 (3) ◽  
pp. 276-281 ◽  
Author(s):  
Jumi Yun ◽  
Ji Sun Im ◽  
Aeri Oh ◽  
Dong-Hwee Jin ◽  
Tae-Sung Bae ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Vinyl Alcohol ◽  
Ph Sensitive ◽  
Poly Vinyl Alcohol ◽  
Composite Hydrogels ◽  
Photocatalytic Activities ◽  
Poly Acrylic Acid
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